Mobile workbench



FIG. 1 is a perspective view of a mobile workbench showing my new design;

FIG. 2 is a front elevation view;

FIG. 3 is a top plan view;

FIG. 4 is a right side elevation view;

FIG. 5 is a left side elevation view; and,

FIG. 6 is a rear elevation view. 

The ornamental design for a mobile workbench, as shown. 